Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and with no two consecutive increases or two consecutive decreases.
A263665
Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and with no two consecutive increases or two consecutive decreases.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =32a(5) =122a(6) =544a(7) =2770a(8) =13102a(9) =53324a(10) =201822a(11) =744369a(12) =2681622a(13) =9781781a(14) =35830358a(15) =134471953a(16) =510679902a(17) =1948913086a(18) =7413069078a(19) =28251926154a(20) =106925701022a(21) =405357452874
External references
- oeis: A263665